Pull-socket for electric lamps.



S. STRAUS.

PULL SUCKET FOR ELECTRIC LAMPS.

APPLICATION FILED )UNE 3.1916.

Patented Jan. 15,1918.-

WI TNESSES By I BAAVInM l THNEYS @man relatesfwgrpulmqckts f melft-GRDQQS'cent lampo :und hais for its 'rliliiiersiozi..

hgh `151,110 puns 'afilie lino 2;-2

trai montag-:ts terminal of the lump wlen the ,latter -is imposition);this `boli; also holds, A4lampeyiug;z. 'stoontact 4, an. angled piecerecessed in the periphery of tho busq membel' l, t0 which 'piece ifsconnected, m 'tho usual wa one of the main flexible oonduc More@ channell',4 recessed in b oth base ahdoover, is provided for this flexible comductor. 1 l A .Socket shell' 8, ,threaded as usual to re- 6'0 oevethecorrspondingthreadedplug ,tor-4 niinul on the lum is atmohedto thebottom of thebody mem er1 bymeansof a bolt: y This socket shelihas1 atop 10 in whlch 1s partly dotmcbv Ei .11). slot `is` so mim-itinserteduti t e bottom of theso4 -below sadflegs. and tend to -foxfged' uninwardly extended .slot (shown1 l mwa-rd nuof dogmas provided proyectonor bos's 'r11 'formed on tHe b'iom i termi) gmclh'forth'e pull chain 14,attjhed to- Suid 'doggby means of which said dbg s ac f mounted nyVcruciform (4 -urmslwtch lunch'ol the-rnwiuing nir ofo p ositueglmAnrmh' 20.

An indentation yformed on the lower und this ndeiitntion is 'e in theupper art of ieg 13. Sprin s 27 are ets and A push the slip memberupwardly. Aprojectlou 27\0n the tio'n on o so fait he forward e ga 28 ofmember 25 is vertical und its upper surface incliues down- I gedfoyaoori j responding'A proj'ootiiw ormed upon tho 4 110s-` 'outorl 26-en lges a corresponding Rrojep- 11 ctof -thsleg' so as to prevent tho slimqmber bem pusheld, upwardly too with a thin walled U-shaped sleeve-2;cpposite walls of which are provided wit circular openings and slotsfrom the top thereof. Chain 14 is connected to the dog 13 by forcing theball at one of its ends down into the sleeve and into vthe circular' oeninfrs.

The contact arm 21 is provided with a downward projection 30 which isadapted to drop into a corresponding hollow in the U-shaped springmembers 20 asthcse members are respectively engaged with said contactarm 21.

A spring 3l upon spindle 18 is held in position by the cover member 2and keeps the crucii'orin contact member- 19 pressed downwardly againstthe plate 17.

Cover member 2, although held to the base member 1 by but 'a single bolt3, is kept centered and prevented from turning by a downwardlyprojecting lng 32, whichrdrops into the end of slide way 12.

A spring 33 surrounds chain 14 and -is interposed between dog 13 and aange 31 at the end of slide way 12; this spring tends to keep dog 13 atthe end of slide way 12 opposite the chain.

An insulating sleeve 35 and outer metal shell 36 of usual type incloscthe socket when assembled.

An incandescent lamp being in position, the operation of my invention isas follows:

vThe part-s being as shown in' the igures'the circuit is closed and the`lamp lighted. The

circuitis through conductor to angled piece 5 and Contact l; thencethrough the amp to4 socketl shell 8,. through bolt 9 to platel' andspindle 18 and to switch member 19. The circuit `then passes through oneof the spring members 20 to and through Contact arm 21'and thence toconductor 23. ,'To break the circuit the chain 14 is pulled thus drawingthe dog 13 along the slide Way .12 and bringingY the edge 2S of slipmember V 25 against the edge of that arm of contact member 19 which` atthe moment,

lies across the-slide way 12.y This will cause the 'switch member 19..tobe rotated through 90O and bring one :ofthe tiatarms of. the

switch under but out of contact with the.

arm 21. The circuit will thus be broken. On releasing the chain, the do13, which will have been drawn 4to the rig t (Fig. 3) so as to have aswitch arm extending across the slide way behind it, will be pushed backby the spring 33; when the pawl 25 comes in contact with the switch 'armthe pawl will be depressed against the resistance of the springs 27, sothat the dog may pass the arm and rest in its original position (at theleft, Fig. 3).

lt will be noted'that the socket of m invention is very simpleand'little liab e to get. out of order. It should also be noted that thepull and movement of the chain 4and switch dog is straight across thecenter ofthe socket so that the chain is not liable to bend or kink. Itshould be noted, further, that each point of the circuit is separated bysubstantial amounts of insulationV from all other parts of the circuitwhich differ substantially from it in E. M. F.

lVhile I have described my invention in one of its possible embodimentsit is obvious that other forms of the invention may easily be designedby those skilled in the art within the spirit of the following claim Ina pull socket, an insulating body having a chamber and a transverseslidewayv opening from the bottom of said chamber, an insulating coverfor said chamber, a spindie set in the bottom of said'chamberto one sideof the slideway, al cruciform switch 'in said chamber loosely A mountedupon said spindle and adapted to have one arm cross the opening'of saidslideway, a spring upon said spindle above the switch and havinfg its'upper end against the lower surface o the cover, a switch dog slidablein the slideway and provided with a chain,v a depressible' pawl upon thetop of saidswitch dogv anda circuit terminal adapted to -make contactwith alternate switch arms,the switch being connected with the othercircuit terminal.

In testimony whereof have hereuntoset m hand. y SAMUEL STRAUS.

